As of April 10, 2015, the last approved working draft of the Concurrency TS

is <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4107.html">N4107</a>.

<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4399.html">N4399</a>

is the new proposed working draft of the Concurrency TS.

<H3>History</H3>

Below is the summary of changes that went into N4399:

<li>

<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4123.html">N4123</a>

proposed improvements to the Concurrency Technical Specification.

These changes were approved with comments by SG1 and LEWG in Urbana, and

incorporated into

<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4313.html">N4313</a>.

</li>

<li>

In Cologne, N4313 was reviewed by LWG and approved with suggestions.

These suggestions (tracked by

<a href="https://github.com/cplusplus/concurrency_ts/issues">

https://github.com/cplusplus/concurrency_ts/issues</a>) were then incorporated into N4399.

</li>

<li>

Also in Cologne, LWG reviewed <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4204.html">N4204</a>.

The authors of N4204 incorporated the LWG feedback into N4392.

That paper has been submitted to the Lenexa mailing and also merged into N4399.

</li>

<li>

Additionally, N4399 incorporates a portion of

<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4260.pdf">N4260</a> that

was reviewed by SG1 and LWG in Urbana.

</li>